Datasheet

3
LTC1546
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V (Notes 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
OSC
Charge Pump Oscillator Frequency 500 kHz
t
r
Charge Pump Rise Time No-Cable Mode/Power-Off to Normal Operation 2 ms
Logic Inputs and Outputs
V
IH
Logic Input High Voltage ● 2V
V
IL
Logic Input Low Voltage ● 0.8 V
I
IN
Logic Input Current D1, D2, D3 ● ±10 µA
M0, M1, M2, DCE = GND
● –120 –75 –30 µA
M0, M1, M2, DCE = V
CC
● ±10 µA
V
OH
Output High Voltage I
O
= –3mA ● 3 4.5 V
V
OL
Output Low Voltage I
O
= 3mA ● 0.3 0.45 V
I
OSR
Output Short-Circuit Current 0V ≤ V
O
≤ V
CC
● –50 50 mA
I
OZR
Three-State Output Current M0 = M1 = M2 = V
CC
, 0V ≤ V
O
≤ V
CC
±1 µA
V.11 Driver
V
ODO
Open Circuit Differential Output Voltage R
L
= 1.95k (Figure 1) ● ±5V
V
ODL
Loaded Differential Output Voltage R
L
= 50Ω (Figure 1) 0.5V
ODO
0.67V
ODO
V
R
L
= 50Ω (Figure 1) ● ±2V
∆V
OD
Change in Magnitude of Differential R
L
= 50Ω (Figure 1) ● 0.2 V
Output Voltage
V
OC
Common Mode Output Voltage R
L
= 50Ω (Figure 1) ● 3V
∆V
OC
Change in Magnitude of Common Mode R
L
= 50Ω (Figure 1) ● 0.2 V
Output Voltage
I
SS
Short-Circuit Current V
OUT
= GND ±150 mA
I
OZ
Output Leakage Current V
A
 and V
B
 ≤ 0.25V, Power Off or ● ±1 ±100 µA
No-Cable Mode or Driver Disabled
t
r
, t
f
Rise or Fall Time (Figures 2, 13) ● 21525 ns
t
PLH
Input to Output Rising (Figures 2, 13) ● 15 40 65 ns
t
PHL
Input to Output Falling (Figures 2, 13) ● 15 40 65 ns
∆t Input to Output Difference, t
PLH
– t
PHL
 (Figures 2, 13) ● 0312 ns
t
SKEW
Output to Output Skew (Figures 2, 13) 3 ns
V.11 Receiver
V
TH
Input Threshold Voltage –7V ≤ V
CM
≤ 7V ● –0.2 0.2 V
∆V
TH
Input Hysteresis –7V ≤ V
CM
≤ 7V ● 15 40 mV
R
IN
Input Impedance –7V ≤ V
CM
≤ 7V (Figure 3) ● 100 103 Ω
t
r
, t
f
Rise or Fall Time C
L
= 50pF (Figures 4, 14) 15 ns
t
PLH
Input to Output Rising C
L
= 50pF (Figures 4, 14) ● 50 90 ns
t
PHL
Input to Output Falling C
L
= 50pF (Figures 4, 14) ● 50 90 ns
∆t Input to Output Difference, t
PLH
– t
PHL
 C
L
= 50pF (Figures 4, 14) ● 0425 ns
V.35 Driver
V
OD
Differential Output Voltage Open Circuit, R
L
= 1.95k (Figure 5) ● ±1.2 V
With Load, –4V ≤ V
CM
≤ 4V (Figure 6) ±0.44 ±0.55 ±0.66 V
V
OA
, V
OB
Single-Ended Output Voltage Open Circuit, R
L
= 1.95k (Figure 5) ● ±1.2 V
V
OC
Transmitter Output Offset R
L
= 50Ω (Figure 5) ● ±0.6 V
ELECTRICAL CHARACTERISTICS